Draw-bridge gate



(No Model.) Z'Sheets-Sheet 1. D. GREENHOOT.

DRAW BRIDGE GATE NGL 877,807. Patented Peb. 14, 1888.

K f?? Ven/br (No Mba-e1.; 2 sheets-sheet 2.- D.l GREENHOOT. DRAW BRIDGE GATE. No. 377,807.. Patented Feb. 14,' 1888.

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UNITED STATI-3s PATENT OFFICE.

DAVID GREENHOOT, OF CINCINNATI, OHIO.

DRAW-BRIDGE GATE.

SPECIFICATION forming part of Letters Patent No. 377,807, dated February 14, 1888.

Application nien Nov-@later 9, leer. serial Nasa-1.671. (No model.)

To all whom it may concern.'

Be it.known that I, DAVID GREENHOOT, a citizen of the-United States. residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented a certain new and use- Gates, of which the following is a full, clear,

' and exact description.

My invention relatesV to an improvement in draw-bridge gates which are arranged tobe automatically opened and closed with the bridge-that is, as the bridge is swung round to open the water-way the bridge of course becomes closed, and unless the approach to it is protected by a gate or guard anyone endeavoring to cross the bridge and not seeing its position, by reason of darkness or carelessness, would fall into the water. It is necessary, therefore, for protection to have the approach to the bridge at either end protected by a gate or guard. If an attendant is required at each end of the bridge to close the gates as the and closed by the act of opening and closing the bridge. Y y

In the accompanying drawings, forming part of this specification, Figure lis a ground plan view` of my improved bridge-gates. Fig. 2 is an end view or elevation of the bridge and gates when open to travel. Fig. 3 is an end A View of the gate when closed to travel.

In Fig. 1 the bridge is shown partially closed. In Fig. 2 the gate is represented as supported by rollers rolling on the cross-beam K, while in Fig. 3 the gate is represented as supported on rollers running in a slot across the road- Way, but below the surface. In Fig. l the gate is represented at A as supportedV from the top, at B as supported from the bottom. The construction and operation of the gate is the same in both cases, the only difference being inthe manner of support. It is sometimes inconvenient to support the gate from above by slot, or, when desired, it may have both the top and bottom supports.

Gis an ordinary draw-bridge swung on an ordinary turn-table, asl at C. On either side of theroadway or approach to the bridge are upright supports D D, and across their top extends thewbeam K. Suspended on that beam by means of the rods F F and rollers E E is a folding gate, G, consisting of strips of wood or metal g, crossing one another and pivoted together at their ends and at the points'of crossing. The outer endsof this gate are attached by pivots to the upright bars F F, the upper pivots moving in the vertical slots F F. the upright supports D D are forked guides L L, which receive the bars F F and hold them in a vertical position when stationary against the supports D D'. On the bars F F, at leither end of the gate, are pivoted the hooks M M, which engage overpins M M on the stationary supports D D and hold the gate shut. There are also pivoted to these bars F F hooks N N.

On the ends of the bridge are fingers O O'andy P P. The fingers P P on opposite sides at opf posite ends of the bridge are caught ou the hooks N when the bridge is open. As the bridge is swung round, these fingers and hooks draw one side of the gate until it comes against the support D and is caught by the guide or guides L, as shown in Fig. 3. In these supports are provided notches or slots P and O', which permit the ends of the ngers P and O to swing past them. A pin, R, strikes the beveled edge of the hook N and releases kthe iinger P, so that the'bridge moves on frecinto a position at right angles with its closed position or clear round, while the hook M catches on the pin M 'and holds the gate closed, both ends of the gate being hooked securely tothe supports D.

As the bridge is swungback or swung round, the finger O passes through the slot O', strikes the upper arm of the hook M, and releases the IOO As the attachments of the gate are the samev at both ends .of the gate, the bridge, when closed, need not necessarily be opened by swinging it back, but may be turned on round and make a complete circle, opening the gate from the opposite side.

The hooks operate automatically to fasten the gate closed when the bridge is closed; but as the bridge is opened these hooks are automatically unlocked, so that the fingers or arms on the bridge may press the gate open. At the same time the hooks N become engaged over the arms or lingers P, so that as the bridge is swung again to close it the gate is pulled shut by the same action, and as soon as shut the hooks arc released, so tliatthe bridge may swing on around free.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. In combination with the swinging drawbridge, the folding gate G, provided with hooks for fastening the gate to the side supports, which are automatically released by the bridge in the act of being opened, substantially as and for the purpose described.

2. In combination 'with a swinging drawbridge, the folding gate G, provided with hooks which automatically engage with fingers -or arms on the bridge, so that when the bridge is closed the gate will be drawn shut and when shut the hooks automatically released from the bridge and the gate locked, substantially as and for the purpose described.

3. The folding gate G, provided with hooks M M and N N, for locking it to the bridge or to the supports D D, substantially as and for the purpose specied.

DAVID GREENHOO'I.

llitriesses:

ALFRED M. ALLEN, ARTHUR STEIN. 

